上海市过江车辆轮渡与黄浦江大桥关系及发展趋势的探讨

本文通过对南陆线、民丹线和东嫩线等主要过江车辆渡运量的预测、统计与分析,全面论述了过江车辆渡与黄浦江大桥的关系。指出了大桥建成后车辆渡的地位与作用并不会萎缩,它仍旧是车辆过江交通工具的主力。即使是紧靠大桥的南陆线车渡也决不能撤除,它将与大桥、隧道形成一个完善的立体越江交通网络。     

我国信息法的法律预测研究

我国信息法的法律预测主要包括:信息法律环境的预测、信息法法律地位的法律预测、信息法建设的法律预测和信息法学研究的分析预测。主要方法有:比拟分析预测法、趋势分析预测法、因素分析法、信息法律模型预测法等。图2。参考文献9。     

区域交通量OD分布推断方法

利用概率统计的理论,提出了借助一些主、客观信息,及一些运输经济技术指标来推断区域交通量OD分布的方法,提出了两种Bayes估计量,以利于最大限度地利用已掌握到的信息对交通量分布的情况进行滚动修正,从而提高精度。     

土壤水分随机模型支持下的土壤水平衡研究进展

土壤水是联系陆地水文过程与生态过程的纽带,且土壤水分动态表现出明显的随机属性。所以土壤水分随机模拟逐渐成为当前生态水文学研究的一个热点,土壤水分随机模拟研究是土壤-植被-大气连续体（SoilPlant-Atmosphere Continuum,SPAC）水分传输机理的关键。本文系统分析了土壤水分随机模型的内涵。对当前典型的土壤水分随机动态模型进行归纳和总结,包括：Milly模型（step model）、Porporato模型（Linear Model）、Shutfleworth and Ellis模型（Ramp Model）、Rodriguez模型、Laio模型,并对这些模型在土壤水平衡分析中的应用进行了推导和分析。展望了土壤水分随机动态模拟与土壤水平衡研究未来发展方向：加强生态水文学实验研究,特别是加强高分辨率、长时间序列的土壤水分监测;加强理论模型的应用研究,广泛开展土壤水分随机模拟在我国非湿润区的应用;加强土壤水分随机模型在土壤水平衡分析及流域水平衡分析的应用,建立更加完善的基于土壤湿度概率密度函数的流域水平衡模型;加强全球变化、土地利用,土地覆被变化对土壤水分动态影响模拟研究。     

《水浒传》与宋代巫风

宋代巫风是构成<水浒传>的文化背景之一,并对人物性格的发展有不可低估的影响,而且巫术预言增强了小说叙事的逻辑性.这既体现了小说内涵的包融性,又给人一种另类的审美感受.     

A Fusion Approach to XML Structured Document Retrieval

In this paper we evaluate the application of data fusion or meta-search methods, combining different algorithms and XML elements, to content-oriented retrieval of XML structured data. The primary approach is the combination of a probabilistic methods using Logistic regression and the Okapi BM-25 algorithm for estimation of document relevance or XML element relevance, in conjunction with Boolean approaches for some query elements. In the evaluation we use the INEX XML test collection to examine the relative performance of individual algorithms and elements and compare these to the performance of the data fusion approaches.     

Incremental Relevance Feedback in Japanese Text Retrieval

The application of relevance feedback techniques has been shown to improve retrieval performance for a number of information retrieval tasks. This paper explores incremental relevance feedback for ad hoc Japanese text retrieval; examining, separately and in combination, the utility of term reweighting and query expansion using a probabilistic retrieval model. Retrieval performance is evaluated in terms of standard precision-recall measures, and also using number-to-view graphs. Experimental results, on the standard BMIR-J2 Japanese language retrieval collection, show that both term reweighting and query expansion improve retrieval performance. This is reflected in improvements in both precision and recall, but also a reduction in the average number of documents which must be viewed to find a selected number of relevant items. In particular, using a simple simulation of user searching, incremental application of relevance information is shown to lead to progressively improved retrieval performance and an overall reduction in the number of documents that a user must view to find relevant ones.     

基于Logistic回归模型的博士研究生超期毕业影响因素分析——以哈尔滨工业大学为例

为充分了解和掌握影响博士研究生超期毕业的主要因素,本研究基于Logistic回归模型相关理论构建博士生超期毕业概率模型。以哈尔滨工业大学为研究载体,对构建的博士生超期毕业模型进行实证分析,并得到了影响博士生超期毕业的关键因素。该研究为博士生超期预警机制的建立、博士生的教育管理以及相关政策的制定提供了一定的参考与借鉴。     

边坡稳定随机场模型效应研究

土体性质表现出其具有固有的应变特性,土体每一点的参数都会发生变化,故在边坡稳定的可靠度分析中不能被忽略。在边坡稳定分析中,常用的模拟土体随机场的模型有折减法、中点法和局部平均离散法。针对一个典型边坡,应用了三个随机场模型导出该边坡的稳定分析结果,对不同随机场模型方法得到的可靠度分析结果进行了互相对比。结果表明边坡的可靠度结果受到土体特性空间变异性的影响,并且这个影响取决于相关距离的相对尺寸和临界滑裂面长度的影响。     

Metacomprehension effects situated within an anchoring and adjustment framework

Low accuracy levels are often obtained when readers are asked to predict test performance over reading materials. Three investigations further explore the information readers use to make predictions during metacomprehension. Our results show that readers’ estimates are influenced by factors such as their initial impression of the reading task, based in part on their perceptions surrounding text genre and test item type. To explain these and other published results, a new framework for investigating metacomprehension using Tversky and Kahneman’s (Science, 185:1124–1131, 1974) anchoring and adjustment heuristic as a guide is proposed. We argue that readers anchor comprehension test performance on factors such as self-perceptions of reading ability and/or perceptions of the reading task and then insufficiently adjust their predictions to reflect the demands of the specific reading task at hand such as text difficulty.